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January 20, 2021 05:13 pm GMT

Easy way to use Dark Mode in Next.js Tailwind

Yesterday I was working on my personal website, and I really wanted to add a dark mode toggle.
I already converted my site to use Tailwind before, so how do I enable dark mode now?

It's simple: in Tailwind v2 dark mode is built in (https://tailwindcss.com/docs/dark-mode).

To be able to toggle the dark mode, you should put darkMode: 'class' in your tailwind.config.js.
This configuration implies that a class called dark will be added to the <html> tag.
Once this class is active, your dark:{class} classes will become active.

To link this functionality up with Next.js I used the lightweight next-themes library (https://github.com/pacocoursey/next-themes).

After installing this library, simply change your _app.js to include the ThemeProvider:

import { ThemeProvider } from 'next-themes'function MyApp({ Component, pageProps }) {  return (    <ThemeProvider attribute="class">      <Component {...pageProps} />    </ThemeProvider>  )}export default MyApp
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Including the attribute="class" is very important, since this tells the library to use the Tailwind dark theme class.

For the toggle button I used the following:

import {useTheme} from 'next-themes'const {theme, setTheme} = useTheme()<button  aria-label="Toggle Dark Mode"  type="button"  className="p-3 h-12 w-12 order-2 md:order-3"  onClick={() => setTheme(theme === 'dark' ? 'light' : 'dark')}>
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An example of the dark:{class} code, this will use a purple background color for light mode and a darkgrey color for dark mode:

<nav className="fixed bg-purple dark:bg-darkgrey h-16 w-full z-50">
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And that's it! The theme is being switched when you click the button.
Live example can be found here: https://www.thomasledoux.be/
Github source: https://github.com/thomasledoux1/website-thomas
Inspired by: https://leerob.io


Original Link: https://dev.to/thomasledoux1/easy-way-to-use-dark-mode-in-next-js-tailwind-2ob1

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